CaltechAUTHORS
  A Caltech Library Service

Extent of Hadley circulations in dry atmospheres

Korty, Robert L. and Schneider, Tapio (2008) Extent of Hadley circulations in dry atmospheres. Geophysical Research Letters, 35 (23). L23803. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:KORgrl08

[img]
Preview
PDF - Published Version
See Usage Policy.

161kB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:KORgrl08

Abstract

The subtropical terminus of the Hadley circulation is interpreted as the latitude poleward of which vertical wave activity fluxes (meridional eddy entropy fluxes) become sufficiently deep to reach the upper troposphere. This leads to a sign change of the upper-tropospheric divergence of meridional wave activity fluxes (convergence of meridional eddy angular momentum fluxes) and marks the transition from the tropical Hadley cell to the extratropical Ferrel cell. A quantitative formulation for determining the depth of vertical wave activity fluxes and thus the terminus of the Hadley circulation is proposed based on the supercriticality, a measure of the slope of isentropes. The supercriticality assumes an approximately constant value at the terminus of the Hadley circulation in a series of simulations with an idealized dry general circulation model. However, it is unclear how to generalize this supercriticality-based formulation to moist atmospheres.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/2008GL035847DOIUNSPECIFIED
ORCID:
AuthorORCID
Schneider, Tapio0000-0001-5687-2287
Additional Information:Copyright 2008 by the American Geophysical Union. Received 28 August 2008; revised 21 October 2008; accepted 27 October 2008; published 2 December 2008. This work was supported by a David and Lucile Packard Fellowship and by the National Science Foundation (grant ATM-0450059). Three anonymous reviewers provided very helpful comments.
Funders:
Funding AgencyGrant Number
David and Lucile Packard FoundationUNSPECIFIED
National Science FoundationATM-0450059
Subject Keywords:Hadley circulation
Issue or Number:23
Record Number:CaltechAUTHORS:KORgrl08
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:KORgrl08
Official Citation:Korty, R. L., and T. Schneider (2008), Extent of Hadley circulations in dry atmospheres, Geophys. Res. Lett., 35, L23803, doi:10.1029/2008GL035847.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12864
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:08 Jan 2009 21:58
Last Modified:03 Oct 2019 00:32

Repository Staff Only: item control page